That's a pretty high speed and a rather thick airfoil on quite a big wing. Is this intended for a 1/4 scale unlimited racer by any chance? Because that's about the only way you'll see that sort of speed from a model of that sort of size.

I would also suggest that even if the spreadsheet says .035 is enough that you double it at least over the first portion to .063 or so. The reason being that if you can hold the tube in a perfect circle shape it may well hold that much load. But if the bending forces cause a small dimple at a wing joint that dimple can lead to a catastrophic failure at that point. Going for a thicker wall will not only make the tube stronger but will support the tube's shape far better at these shear plane joints.